Olympic heavyweight champ (1968); world heavyweight champ (1973-74 and 94-95); lost title to Muhammad Ali (KO-8th) in '74; recaptured it on Nov. 5, 1994 at age 45 with a 10-round KO of WBA/IBF champ Michael Moorer, becoming the oldest man to win heavyweight crown; named AP Male Athlete of Year 20 years after losing title to Ali; stripped of WBA title in 1995 after declining to fight No. 1 contender; successfully defended title at age 46 against 26-year-old Axel Schulz in controversial maj. decision; gave up IBF title after refusing rematch with Schulz.